1.  groin(n = noun.body) inguen - the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals;
is a kind of area, region
is a part of loins

2.  groin(n = noun.artifact) - a curved edge formed by two intersecting vaults;
is a kind of edge

3.  groin(n = noun.artifact) breakwater, bulwark, groyne, jetty, mole, seawall - a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away;
is a kind of barrier

   groin(v = verb.creation) - build with groins; "The ceiling was groined"
is one way to build, construct, make
Sample sentences: Somebody ----s something

   The snout of a swine. Chaucer. [1913 Webster]

   To grunt to growl; to snarl; to murmur. Chaucer. [1913 Webster]
"Bears that groined coatinually." [1913 Webster]

1.  The line between the lower part of the abdomen and the thigh, or the region of this line; the inguen. [1913 Webster]

2.  The projecting solid angle formed by the meeting of two vaults, growing more obtuse as it approaches the summit. [1913 Webster]

3.  The surface formed by two such vaults. [1913 Webster]

4.  A frame of woodwork across a beach to accumulate and retain shingle. Weale. [1913 Webster]

   To fashion into groins; to build with groins. [1913 Webster]
"The hand that rounded Peter's dome,
And groined the aisles of Christian Rome,
Wrought in a sad sincerity." [1913 Webster]

groin, n. & v.
--n.
1 the depression between the belly and the thigh.
2 Archit. a an edge formed by intersecting vaults. b an arch supporting a vault.
--v.tr. Archit. build with groins.

groin, US var. of GROYNE.

N  angularity, angularness, aduncity, angle, cusp, bend, fold, notch, fork, bifurcation, elbow, knee, knuckle, ankle, groin, crotch, crutch, crane, fluke, scythe, sickle, zigzag, kimbo, akimbo, corner, nook, recess, niche, oriel, coign, right angle, obliquity, angle of 45 degrees, miter, acute angle, obtuse angle, salient angle, reentering angle, spherical angle, angular measurement, angular elevation, angular distance, angular velocity, trigonometry, goniometry, altimetry, clinometer, graphometer, goniometer, theodolite, sextant, quadrant, dichotomy, triangle, trigon, wedge, rectangle, square, lozenge, diamond, rhomb, rhombus, quadrangle, quadrilateral, parallelogram, quadrature, polygon, pentagon, hexagon, heptagon, octagon, oxygon, decagon, pyramid, cone, Platonic bodies, cube, rhomboid, tetrahedron, pentahedron, hexahedron, octahedron, dodecahedron, icosahedron, eicosahedron, prism, pyramid, parallelopiped, curb roof, gambrel roof, mansard roof, angular, bent, crooked, aduncous, uncinated, aquiline, jagged, serrated, falciform, falcated, furcated, forked, bifurcate, zigzag, furcular, hooked, dovetailed, knock kneed, crinkled, akimbo, kimbo, geniculated, oblique, fusiform, wedge-shaped, cuneiform, cuneate, multangular, oxygonal, triangular, trigonal, trilateral, quadrangular, quadrilateral, foursquare, rectangular, square, multilateral, polygonal, cubical, rhomboid, rhomboidal, pyramidal.